Portsmouth Naval Shipyard

Portsmouth Naval Shipyard
Seavey's Island, Kittery, Maine
Portsmouth Naval Shipyard in 2004
Coordinates	43°4′44″N 70°44′3″W / 43.07889°N 70.73417°W / 43.07889; -70.73417
Type	Shipyard
Site information
Controlled by	United States Navy
Open to the public	No
Site history
Built	1800
In use	1800–Present
Battles/wars
Portsmouth Naval Shipyard
U.S. National Register of Historic Places
U.S. Historic district
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Location	Seavey Island, Kittery, Maine
Area	54 acres (22 ha)
Architectural style	Colonial Revival, Greek Revival
NRHP reference No.	77000141[1]
Added to NRHP	November 17, 1977
Garrison information
Current commander	Capt. Michael Oberdorf (February 22 -present)

The Portsmouth Naval Shipyard, often called the Portsmouth Navy Yard, is a United States Navy shipyard on Seavey's Island in Kittery, Maine, bordering Portsmouth, New Hampshire. The naval yard lies along the southern boundary of Maine on the Piscataqua River.

Founded on June 12, 1800, PNS is U.S. Navy's oldest continuously operating shipyard. Today, most of its work concerns the overhaul, repair, and modernization of submarines.^[2]

As of November 2021, the shipyard employed more than 6,500 federal employees.^[3] As well, some of the work is performed by private corporations (e.g., Delphinius Engineering of Eddystone, Pennsylvania; Oceaneering International of Chesapeake, Virginia; Orbis Sibro of Mount Pleasant, South Carolina; and Q.E.D. Systems Inc. of Virginia Beach, Virginia).^[4]